In good working condition with original box and 18VAC power adapter. From the manufacturer:
The Acousti-Q is the first affordable tube-based preamp/blender for acoustic instruments. The Acousti-Q is the perfect solution for acoustic musicians wanting to bring their personal style and sound to new heights! The Acousti-Q gives you the choice to use a single (piezo pick-up) or dual (piezo pick-up & mini-internal microphones) source. With two sources, you can blend the two signals to achieve the perfect mix. Guitars, woodwinds, basses, brass instruments – virtually any acoustic instrument can benefit from the warm tube sound of the Acousti-Q.
The Acousti-Q employs two dual-servo preamplifiers with separate gain controls for input, a phase switch, a 12V phantom power supply to accommodate miniature, internal condenser microphones, a variable notch filter and sweepable mid-band EQ, as well as low and high-shelving EQ controls. The master output section gives you the ability to set two separate volumes, one for normal volume, and the other, a boost, for solo playing.